Simultaneous Matching of Phase and Amplitude for Spontaneous Parametric Down-conversion in Semiconductor Waveguides

• URL: http://arxiv.org/abs/2509.14903v1
• Date: Thu, 18 Sep 2025 12:27:34 GMT
• Title: Simultaneous Matching of Phase and Amplitude for Spontaneous Parametric Down-conversion in Semiconductor Waveguides
• Authors: Albert Peralta Amores, Marcin Swillo,
• Abstract summary: We propose a non-uniform modulation of $chi(2)_xyz$ to significantly enhance photon pair generation efficiency.<n>Our analysis predicts a tenfold efficiency increase in comparison to the most efficient non-modulated waveguide.<n>We also explore the implementation of a highly efficient compact twin-photon source, tunable across the communication band.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a non-uniform modulation of $\chi^{(2)}_{xyz}$ to significantly enhance photon pair generation efficiency via spontaneous parametric down-conversion in modal phase-matched semiconductor waveguides. This approach enables amplitude-matching in the transverse direction while preserving the phase-matching along the waveguide propagation axis. Our analysis predicts a tenfold efficiency increase in comparison to the most efficient non-modulated waveguide, and up to 13 orders of magnitude efficiency enhancements relative to solely phase-matched waveguides. Furthermore, we explore the implementation of a highly efficient compact twin-photon source, tunable across the communication band, using an amplitude- and phase-matched structure.

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